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#1. A BCBA develops a behavior intervention plan for a client and instructs three RBTs to collect data on the client’s ‘tantrum behavior’ and then calculate the average frequency or duration. RBT 1 submits data indicating that ‘tantrums occurred on average 30 minutes apart.’ RBT 2 submits data stating ‘tantrum duration averaged 3 minutes per occurrence.’ RBT 3 submits data indicating ‘running away happened for 30 seconds’ and reports it as ‘tantrum data.’ This collection of data, when considered across all three RBTs, most clearly lacks what essential characteristic of quality data in Applied Behavior Analysis?
Validity refers to the extent to which a measurement system actually measures what it purports to measure The BCBA asked for data on tantrum behavior RBT 1 reports data on the interresponse time IRT between tantrums occurred on average 30 minutes apart While IRT can be a measure its not explicitly tantrum behavior itself RBT 2 reports data on tantrum duration which directly measures the property of the tantrum RBT 3 however reports data on running away and labels it as tantrum data This indicates a fundamental lack of clarity or agreement on the operational definition of tantrum behavior leading to the measurement of a different behavior entirely When data collectors are measuring different aspects of a behavior or even entirely different behaviors the data lacks validity because it is not consistently measuring the intended target behavior Accuracy refers to the extent to which the observed value matches the true value of the event While there might be accuracy issues within each RBTs data the primary issue highlighted by the different types of data being collected for the same target behavior and one RBT measuring a different behavior altogether is a lack of validitythe collective data isnt measuring tantrum behavior consistently or correctly across all RBTs Reliability refers to the extent to which a measurement procedure yields the same results when repeated under the same conditions eg by different observers or at different times While the data would likely also be unreliable due to the validity issues the root cause here is that they are not even consistently measuring the same thing If all RBTs were measuring tantrum duration but reporting wildly different durations for the same occurrences that would be a primary reliability issue Precision refers to the exactness or refinement of a measurement While important the fundamental issue here is not the level of detail or exactness of the measurement but rather whether what is being measured is truly the target behavior as defined by the BCBA
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